If it was not injected, l would finish the cook... First off, simple Salt goes a long way toward inhibiting or killing bacteria. Second, the meat goes in to a 200°+. Smoker. Short of the fire dieing within minutes on a Cold night, the surface, the only place bacteria can be, would have quickly climbed above 165° and killed off all bacteria. Only thing left of consequence are C Bot Spores and they can't become active in an oxygen rich environment. So essentially a sterile piece of meat sat for 12 hours waiting to be cooked. It will be fine, again, if not injected...JJ